/*左侧分类列表*/
.img_bg {
    width: 200px;
}

ul.list-group {
    margin-top: 1vw;
    position: absolute;
    top: 40px;
}

ul.list-group > .list-group-item {
    width: 200px;
    height: 150px;
    padding: 0;
    background: transparent;
}


li.list-group-item:hover {
    width: 200px;
    color: #fff;
    background: transparent;
}

li.list-group-item.listColor {
    position: relative;
    width: 20px;
    background: #4ce;
}

/*返回按钮*/
.back {
    width: 80px;
    height: 80px;
    border-radius: 40px;
    position: fixed;
    right: 30px;
    bottom: 30px;
    background: rgba(200, 200, 200, .3);
}

.back img {
    width: 80px;
    height: 80px;
    border-radius: 40px;
    position: fixed;
    right: 30px;
    bottom: 30px;
}
